Drilling machine



Feb. 14, 1928. 1,659,218

w. 1". SEARS DRILLING MACHINE Filed Feb. 5, 1923 F175]; zs 35 2 5 4.0 AM,

i. O 1e INVENTOR y W 6am av ATTORNEY Patented Feb. 14, 1928.

UNITED STATES PATIENT OFFICE.

WILLARD T. SEARS, OF MONTOLAIR, NEW JERSEY, ASSIGNOR '10 NILES-BEMENT-POND COMPANY, 01 NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

DRILLING MACHINE.

Applicationfiled February 5, 1923. Serial No. 617,101.

This invention relates to drilling. machines and particularly to radial drilling machines wherein a radial "drill supporting arm is vertically adjustably mounted on a supporting column, such a machine being usuall provided with means for adjusting the drill supporting arm on the column and with a clamping means for securing the arm to the column in its adjusted position. a It is a particular object of this invention to provide improved means, as the conveniently located hand levers illustrated, for moving both the arm adjusting means and the clamping means into their operative and inoperative positions, the levers and means being so related that when either means is in the operative position the other means is in the inoperative position.

As illustrated in the drawing, the mechanism may be. operated from either of two hand levers, one located at the base of the machine and the other on' the drill spindle saddle thereof. It will be understood, however, that if desired either of these levers may be dispensed with and the mechanism controlled from the other lever. The primary object of the invention is to provide.

a mechanism of the above type with more conveniently located means for controlling the arm clamping and operating mechanism. With the above and other objects in view, my invention consists in the features of construction and operation set forth in the following specification and illustrated 1n the accompanying drawing. In such drawing annexed hereto and forming a, part of this specification, I have shown one embodiment of my-invention but it will be understood that the. invention 'can be otherwise embodied and that the drawing is not to be construedas defining or limiting the scope of the inventiom'the claims appended-to thls specification being reliedupon for that par-- ose. Referring to the figures of the drawing:

Figure 1 is a front elevation of a radlal drilling machine embodying my invent on. Fig. 2 is an enlarged horizontal section of .a portion'of the machine taken on line 2-2 ofFig. 1. 1

Fig. 3 is an enlarged fragmentary front. elevation of the machine showing the arm clamped'to'thecolumn and the arm adjnsting mechanism in the inoperative pos1t1on.

21011 the arm and the nut. A collar 22 pre- Fig etis a like yiew butshowing the arm clamping mechanism in the unclamped posltion and the arm adjusting mechanism in the operative position.

the column. A saddle 4 with a'drill spindle 5 mounted thereon is supported for adjustable movement along the arm 3 on-one side of the column and .a drivino' means, as the motor 6, with the gearing illhstrated in dotted-lines in Fig. 1, is supported on the opposlte side of the column. I have furthermore illustrated means for vertically adjusting the arm on the column, clampin means for securing the arm in its adjuste position, and a unitary device, includin the controlling levers illustrated, for shi ing both such means. into their operative and inoperative positions. The arm 3 is adapted to be adjusted verti cally on the column 2 referably from the motor 6 through the 0 lowing mechanism: A pinion 7 keyed to the motor shaft meshes with a gear 8 loosely mounted on the arm shaft 9. Connected with the gear 8jis a pinion 10 which meshes witha gear 11 on a countershait 12. One element 13 of a toothed clutch 13 is splined to the counter- I shaft 12. The other element 13" .of such clutch is provided with a socket 14 ada ted to rotatably support the end of the sha .12

therein. The element 13" of the clutch is keyed to a short shaft 151 having a' bevel '95 gear 16 thereon meshing with a bevel gear; 16 secured to a rotatable nut 17 in threaded engagement with a screw 18. This screw is non-rotatablysupported on the column at 19 and the nut 17 serves to support the entire weight of the arm and the adjusted parts thereof upon the screw. Preferably a ball bearing 20 is interposed between a bearing vents .downward movement of the nut with" respect to the bearing.

The means for clamping the arm to the. column in 'its adjusted position is particularly illustrated in 2 and preferably I away from the member 23 and released the a by the cam roove 35 and engaged the clutch g comprises the following mechanism: Set into grooves formed at the junction of the column 2 and arm 3'are complemental clamping members 23 which'as will hereinafter appear move up" and down with the arm 3 and also are adapted to engage against the column 2 when it is desired to clamp the arm 3 in the adjusted position on the column.- Extending through these clampingmembers 23 are rods 24, each rod at one end being provided with holding and check nuts 25. The other end of each rod isprovided thereon with a head 26 through which extends a vertical shaft 27 rotatably journaled in the basev of the column at 28. splined to the shaft 27betweeneach head 26 and a bearing 29 on the member 23 is an eccentric element 30. The shaft 27 may be rotated by .a handle 31 preferably at the base of the column whereby to place the eccentrics 30 in either the arm clamping or re leased osition.

A yo e 32 on the inner end of a short shaft '33 in the arm engages the clutch 13. A pin 34 in the free end of an arm 34 on the outer end of shaft 33 engages in a cam groove 35' on an element 35 splined to the shaft 27 between bearings 36 on the member 23. i

In Figs. 3 and the mechanismis shown in the arm clamping position and in Fig. 4 in the released position. In F igs. 3 and 5 the shaft 27 is turned'to a position wherein the high portions, of the, eccentrics bear against the member 23 and draw both members 23 into clamping engagement with the column and arm. It will also be noted that the clutch 13 is in a' disengaged position. When it is desired to elevate or lower the armon the column, the shaft 27 is rotatedto the position shown in Fig. 4 wherein the high portions of the eccentrics have moved clamping pressure thereon. The element rotates with the shaft 27 and it will be noted that the arm 34 has been'moved downwardly 13. Thus the arm is unclamped from the column and theclutch 13 is engaged whereby to rotatethe nut 17 to adjust the arm. When the arm has been adjusted, the shaft 27 may be rotated back to its original position,

- which rotation operates to disengage the It 'should be understood that the-larger sizes of radial drills of the type illustrated are comparatively high. By placing the arm elevating and clamping lever 31 at the base of the machine as illustrated. even the short est operator will have no" difficulty in manipulating-the same. It may, however, be desirable to control the mechanism from the saddle 4 or from either the saddle or base. I

have illustrated means. for controlling the mechanism in such manner. 4

A bevel gear 37 splined to the shaft 27 meshes with a bevel gear 38 on the outer end of a transverse shaft 39 in the arm. A bevel gear 40 on the inner end of shaft 39 meshes with a bevel gear 41 on one end of a shaft 42 extending along the arm and through the column 2 and saddle 4. A handle 43 on the saddle is splined to the shaft 42. Rotation of the horizontal'shaft 42 by the handle 43 is adapted .to rotate the vertical shaft 27 and control the mechanism in the same manner as described above in reference to the handle 31. It will be understood that the mechanism may be constructed, in a manner to be controlled either from the base or saddle or both.

What I claim is:

1. In a drilling machine, the combination of a support, an arm adjustable thereon, means for adjusting the arm, a drill spindle supporting head on the arm, means for se C11I1I1g the arm to the support in adjusted position, and a manually operable device adjacent the head for moving both such means into the operative and inoperative positions, the device and means being so related that when either means is inthe operative position the other means is in the inoperative position.

2. A radial drilling machine comprising the combination of a base, a column thereon, an arm adjustable on the column, means for adjusting the arm, means for securing the arm to the column in adjusted position, and

a manually operable device adjacent the base for moving both such means into the operative and inoperative positions, the device and means being sorelated that when either means-is in the operative position the other means is in the inoperative position.

3. A radial drilling machine comprising the combination of a base, a column thereon, an arm adjustable on the column, a drill spindle supporting head on the arm, means for adjusting the arm on the column, means for securing the arm to the column in adjusted position, and a manually operable device adjacent the head for moving both such means into the operative and inoperative positions. the device and means being so related that when either means is in the operative position the other means is in the inoperative position. clutch l3 and to clamp the arm to the col-' 4: A radial drillingmachinecom rising the combination of a base, a column t ereon,

an arm. adjustable on the column, a drill spindle supporting head on the arm, means for adjusting the arm on the column, means for securing the arm to the column in adjusted position; and means including manually operable devices adjacent the head and base whereby both first named means "may be controlled from either of such positions, the

device and means being so related that when either meansos 1n the operative position the other means is in the inoperative position.

. shaft-for operating .anism and means being so related that when I dle on the shaft at a point ,the screw threaded means,

5. A radial drilling machine comprising the combination of a base, a column thereon, an arm adjustable on the column, a drill s indle supportin head on the arm, screw tlireaded means or adjusting the arm on the column, clamping means for securing the arm to the column in adjusted position, mechanism including a shaft extending along the arm for moving both said means into the operative and inoperative positions, and a hand lever on the head splined to the the same, the said mecheither means is in the operative position the other means is in the inoperative. position. a

, .6. A radial drilling machine comprising the combination of a base, a columnthereon, an arm adjustable on the column, a drill spindle supporting head on the arm, screw threaded means for adjusting the arm on the column, clamping means for securing the arm.

to the column in adjusted position, a clutch for engaging or disengaging a shaft for operating the clamping means and shifting the clutch, rotation of the shaft in one direction being adapted to disengage the clamping means and engage the clutch and rotation of the shaft in the opposite direction being adapted to disengage the clutch and engage the clamping means, and anoperating hanremote from the clamping means and clutch.

7. A radial drilling machine comprising the combination of a base, a vertically extending column thereon, an arm adjustable on the column, means for adjusting the arm, means for engaging and disengaging the arm adjusting means, means for clamping the arm to the column in adjusted position, a shaft extending upwardly along the column, the shaft being operatively connected to the second and third named means wherea by rotation of the shaft in one direction is adapted to disengage the clamping means and engage the second named means and rotation of the shaft in the opposite direction is adapted to disengage the second named means and engage the clamping means, an operating handle on the shaft adjacent the base.

8. A radial drilling machine com rising the combination of a base, a vertica y extending column thereon, an arm adjustable on the column, means for adjusting the arm, clutch means for engaging and disenga g the arm adjusting means, a shaft exten ing upwardly along the column, cam means on the shaft for clamping the arm to the column in adjusted position, the shaft being also operat-ively connected to the clutch means whereby rotation of the shaft in one direction is adapted to disengage the clamp ing means and engage the clutch means and rotation of the shaft in the opposite direction is adapted to disengage the clutch means and engage the clamping means, and an operating handle on the shaft adjacent the base.

9. A radial drilling machine com rising the combination of a base, a vertica ly extending column thereon, an arm adjustable on the column, a drill spindle supporting head on the arm, screw threaded means for adjusting the arm on the column, clutch means for engaging and disengaging the screw threaded means,clamping means for securing the arm to the column in adjusted position, a shaft extending upwardly along the column, the shaft being operatively connected to the clutch means and clamping means whereby rotation of the shaft in one direction is adapted to disengage the clamp ing means and engage the clutch means and rotation of the shaft in the opposite direction is adapted to disengage the clutch means and engage ,the clamping means, an operating handle on the shaft adjacentthe base, a horizontal shaft on the arm operatively connected to the vertical shaft, and a handle on the horizontal shaft, the clutch means and clamping means being adapted to be operated from either of said handles.

In testimony whereof, I hereto aflix my signature.

WILLARD SEARS.

and 

